need more MPG's

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Feb 16, 2008 | 06:40 PM

redsford

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Joined: Oct 2006

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From: Missouri

need more MPG's

my '87 F150, 4.9 will not get better than 10 mpg. and loosing power climbing hills help....

Feb 16, 2008 | 07:03 PM

StealthWyvern

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Joined: Feb 2007

Posts: 630

Likes: 1

Are you running large over sized tires with a lift? recent tune up? pulling a load? 4x2 or 4x4? CEL?

Last edited by StealthWyvern; Feb 16, 2008 at 07:23 PM.

Feb 23, 2008 | 03:52 PM

redsford

Thread Starter

New User

Joined: Oct 2006

Posts: 8

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From: Missouri

need more mpg's

No large tires or anything, did tune up 4 months ago before winter started. its also a 2 WD. Starts easy and idles normal yet when driving at 70 mph and climbing a hill I lose about 15 mph before I reach the top of the hill and it is not a real steep grade... just put a new clutch and brakes also...

Feb 23, 2008 | 05:09 PM

TheRoadVirus

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Joined: Sep 2005

Posts: 841

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From: Orangeville, Ontario

Did your tuneup include a fuel filter? Check fuel psi and do a compression check.

Feb 24, 2008 | 12:38 PM

Red Diamond Ranch

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Joined: Jan 2008

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From: Oklahoma

Check your Cat converter and your muffler for blockage. The inards collapse sometimes and block the exhast flow.https://www.ford-trucks.com/forums/n...e=1&p=5746333#

Feb 24, 2008 | 12:40 PM

quicklook2

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Joined: May 2004

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From: Lakewood, Ohio

use a vacuum gauge to check for a blocked exhaust system.

check plugs for fouling.

Feb 24, 2008 | 11:01 PM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

What gearing does the truck have?
What tranny?

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Feb 25, 2008 | 12:32 AM

Animalistic

Elder User

Joined: Dec 2006

Posts: 550

Likes: 1

From: Hillsboro, OR

Quote:

Originally Posted by emiltech

check something simple ....tire pressure....brake adjustment...transmission shifting properly (auto)

That would be my guess. Jack each tire up and make sure it spins with no restance. It is amazing how much friction can be created from a bad bearing or a stuck brake.

Feb 25, 2008 | 12:56 AM

#10

BChance

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Joined: Apr 2007

Posts: 617

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From: Los Alamos

need more MPG's

Don't we all?

Did it happen start right after some of the work you listed was done?

Feb 26, 2008 | 09:42 PM

#11

redsford

Thread Starter

New User

Joined: Oct 2006

Posts: 8

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From: Missouri

No it started as the temperatures started to go down, as far as the brakes and stuff, the tires spin freely and the trans is a 4 spd. also put new exhaust system in it last summer.

Feb 26, 2008 | 09:51 PM

#12

quicklook2

Post Fiend

Joined: May 2004

Posts: 11,289

Likes: 6

From: Lakewood, Ohio

what was included in your new exhaust?

pull plugs.

use a vacuum gauge to check condition of engine.

Feb 26, 2008 | 11:28 PM

#13

Kista20

Elder User

Joined: May 2003

Posts: 530

Likes: 1

From: Harrisonburg, VA

check tire pressures both my vehicles were low because of the cold weather, dad has an 87 f150 2wd short bed 4.9 w/ 3 speed w/od, 3.55's and he gets-17-18 mpg's all the time.

Feb 27, 2008 | 09:29 AM

#14

Grey89F250

Senior User

Joined: Dec 2007

Posts: 174

Likes: 0

I have mine figured in at about 11mpgs!! I gonna check the cat on mine. How do you check the cat? Sorry for the hijack!!

Feb 27, 2008 | 03:41 PM

#15

wpinef

Junior User

Joined: Jan 2005

Posts: 84

Likes: 0

10-11 MPG with the truck in my sig

Dave

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